US20140285296A1 - Power generation device - Google Patents
Power generation device Download PDFInfo
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- US20140285296A1 US20140285296A1 US14/295,956 US201414295956A US2014285296A1 US 20140285296 A1 US20140285296 A1 US 20140285296A1 US 201414295956 A US201414295956 A US 201414295956A US 2014285296 A1 US2014285296 A1 US 2014285296A1
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- magnet member
- yoke
- state
- magnet
- power generation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
Definitions
- the present disclosure relates to compact power generation devices for use in a wide range of electronic equipment, and operation devices and units for remote control of the equipment.
- FIG. 10 is a schematic view of the conventional power generation device. As shown in FIG. 10 , conventional power generation device 1 is provided with magnet member 10 servicing as a movable-side part and yoke member 20 servicing as a fixed-side part.
- Magnet member 10 is configured including permanent magnet 11 such that the N pole and the S pole thereof are positioned in the upside and the downside, respectively. To the upper and lower surfaces of permanent magnet 11 , upper plate 12 and lower plate 13 are respectively fixed, with the both being made of a magnetic substance. Then, magnet member 10 is rotatable in a clockwise/counterclockwise direction about rotation-axis line 11 A that passes through the center of permanent magnet 11 .
- Yoke member 20 is one that is made of a magnetic substance and formed in a U-shape when viewed from the top, and that is disposed and fixed to such as a case (not shown).
- the yoke member has left leg 21 interposed between the left part of upper plate 12 and the left part of lower plate 13 , and right leg 22 interposed between the right part of upper plate 12 and the right part of lower plate 13 .
- center part 23 connects left leg 21 and right leg 22 .
- induction coil 25 is wound.
- Coil spring 27 is disposed on the lower surface of the left part of lower plate 13 .
- power generation device 1 is configured with magnet member 10 , yoke member 20 on which induction coil 25 is wound, and coil spring 27 .
- Power generation device 1 is capable of generating electric power by an electromotive force which is induced in induction coil 25 due to changes in a magnetic flux. The operation will be described hereinafter.
- magnet member 10 is applied with a force by such as a pressing member (not shown) from the upper left side of upper plate 12 , as indicated by the arrow in FIG. 10 . Then, magnet member 10 remains at rest, with the left part thereof being lowered. That is, in this situation, the lower surface of the left part of upper plate 12 is in contact with left leg 21 of yoke member 20 , while the upper surface of the right part of lower plate 13 is in contact with right leg 22 . Moreover, coil spring 27 is pressed into a compressed state under the lower surface of the left part of lower plate 13 .
- the magnetic flux of permanent magnet 11 flows from the upside N pole through the left part of upper plate 12 , through left leg 21 , center part 23 , and right leg 22 of yoke member 20 , through the right part of lower plate 13 , to the downside S pole of permanent magnet 11 , in this order.
- the state shown in FIG. 10 is referred to as the first state.
- the magnetic flux of permanent magnet 11 flows from the upside N pole through the right part of upper plate 12 , through right leg 22 , center part 23 , and left leg 21 of yoke member 20 , through the left part of lower plate 13 , to the downside S pole of permanent magnet 11 , in this order.
- the magnetic flux inside yoke member 20 begins to flow in the opposite direction to that in the first state, which causes a change in the direction of the magnetic flux.
- a predetermined electromotive force is generated in induction coil 25 .
- a predetermined electric power is obtained via coil wires at the both ends across induction coil 25 .
- Patent Literature 1 is known as the information on the conventional technology related to the invention disclosed in the present application.
- Patent Literature 1 U.S. Pat. No. 7,710,227
- Conventional power generation devices are configured to generate electric power in such a manner that magnet member 10 servicing as a movable-side part rotates to induce an electromotive force in induction coil 25 which can generate the power. This configuration, however, has had a problem that these devices are difficult to thin in size.
- An object of the present disclosure is to overcome such the problem and to provide power generation devices with a configuration capable of being made thinner in size.
- the present disclosure includes a first magnet member, a second magnet member with the N pole positioned in the opposite direction to that of the first magnet member, a yoke disposed between the first magnet member and the second magnet member, and an induction coil disposed at the periphery of the yoke.
- FIG. 1 is an external perspective view of a power generation device according to a embodiment
- FIG. 2 is a perspective view of the power generation device, with a cover being removed, according to the embodiment
- FIG. 3 is an exploded perspective view of the power generation device according to the embodiment.
- FIG. 4 is a perspective view of a major part of a fixed-side part of the power generation device according to the embodiment.
- FIG. 5 is a perspective view of a major part of a movable-side part of the power generation device according to the embodiment.
- FIG. 6 is a top view illustrating a first state of the power generation device, with the cover being removed, according to the embodiment
- FIG. 7 is a schematic view illustrating a positional relation in the first state between magnet members and a yoke of the power generation device, according to the embodiment.
- FIG. 8 is a top view illustrating a second state of the power generation device, with the cover being removed, according to the embodiment
- FIG. 9 is a schematic view illustrating a positional relation in the second state between the magnet members and the yoke of the power generation device, according to the embodiment.
- FIG. 10 is a schematic view of a conventional power generation device.
- FIG. 1 is an external perspective view of a power generation device.
- FIG. 2 is a perspective view of the power generation device, with a cover being removed.
- FIG. 3 is an exploded perspective view of the device.
- FIG. 4 is a perspective view of a fixed-side part of the device.
- FIG. 5 is a perspective view of a movable-side part of the device.
- FIG. 6 is a top view illustrating a first state of the device, with the cover being removed.
- FIG. 7 is a schematic view illustrating a positional relation between magnet members and a yoke in the first state.
- FIG. 8 is a top view illustrating a second state of the power generation device, with the cover being removed.
- FIG. 9 is a schematic view illustrating a positional relation between the magnet members and the yoke in the second state.
- case 31 made of resin has a box shape with an upside rectangular opening.
- rod-like center yoke 41 made of a magnetic substance is fixed with an adhesive or the like. Note that, in the following descriptions, the direction along the longitudinal direction of center yoke 41 is defined as the front-back direction, while the direction perpendicular to the longitudinal direction in plan view is defined as the left-right direction.
- Center yoke 41 is disposed and fixed at the center in the left-right direction of the recess of case 31 such that the longitudinal direction of the yoke is parallel to the front-back direction (see FIG. 4 and others).
- Front end 42 and back end 43 of the longitudinal sides of the center yoke are each formed in the same quadrangular-prism shape that is larger in size than the midsection of the yoke.
- the left- and right-side surfaces of front end 42 and back end 43 are each a vertical flat surface.
- induction coil 45 is disposed at the periphery of the midsection between front end 42 and back end 43 of center yoke 41 .
- Induction coil 45 is fixed to center yoke 41 .
- Induction coil 45 used herein is small in dimension enough to be accommodated within a space defined by the up-down and left-right dimensions of both front end 42 and back end 43 .
- Coil wires coming from the both ends of the induction coil are fixed at connection parts that are disposed on the inner bottom surface of case 31 , and are connected to terminals of case 31 .
- first auxiliary yoke 51 is fixed with an adhesive or the like (see FIG. 4 and others).
- the first auxiliary yoke has a U-shape in top view, with the top opening side of the U-shape facing center yoke 41 .
- the lateral sides facing each other of the U-shape are each formed in the same quadrangular-prism shape; the lateral sides are parallel to each other and extend toward the right side.
- End 53 and end 54 of the U-shaped auxiliary yoke are opposed to the left-side surfaces of front end 42 and back end 43 , respectively, at a predetermined distance.
- End 53 and end 54 of first auxiliary yoke 51 as well are each formed to be a vertical flat surface.
- second auxiliary yoke 61 is fixed with such as an adhesive (see FIG. 4 and others).
- the second auxiliary yoke has a U-shape in top view, with the top opening side of the U-shape facing center yoke 41 .
- the lateral sides facing each other of the U-shape are each formed in the same quadrangular-prism shape; the lateral sides are parallel to each other and extend toward the left side.
- End 63 and end 64 of the U-shape are opposed to the right-side surfaces of front end 42 and back end 43 , respectively, at the same distance as that for first auxiliary yoke 51 .
- End 63 and end 64 of first auxiliary yoke 61 as well are each formed to be a vertical flat surface.
- the major part of the fixed-side part is configured in this way.
- the movable-side part that is movably combined with the fixed-side part will be described with reference to FIG. 5 .
- the major part of the movable-side part is configured including first magnet member 71 , second magnet member 81 , and driving member 91 to hold both the magnet members.
- the first and second magnet members are each formed in a rod shape.
- the driving member is a rectangular frame made of resin.
- First magnet member 71 is configured including permanent magnet 73 that is disposed at the center in the front-back direction of the first magnet member and that has a rectangular parallelepiped shape. To the front and back end surfaces of the permanent magnet 73 , magnetic substances 75 and 76 are respectively fixed which are formed in the same quadrangular-prism shape.
- permanent magnet 73 is disposed such that the front side thereof is the N pole while the back side thereof is the S pole; therefore, the magnetic substance 75 side of the first magnet member is the N pole, while the magnetic substance 76 side of the first magnet member is the S pole.
- the total length of the first magnet member is approximately equal to center yoke 41 .
- permanent magnet 73 is preferably disposed at the center of the first magnet member because this arrangement allows the commonality of magnetic substances 75 and 76 ; however, the arrangement of permanent magnet 73 is not particularly limited. Note, however, that the first magnet member may be configured only with a permanent magnet, without magnetic substances 75 and 76 .
- Second magnet member 81 includes permanent magnet 83 having a rectangular parallelepiped shape that is disposed at the center of the second magnet member in the front-back direction.
- second magnet member 81 has the same configuration as that of first magnet member 71 , its configuration is different from that of first magnet member 71 in that permanent magnet 83 is arranged to have the opposite orientation to that of permanent magnet 73 . That is, permanent magnet 83 of second magnet member 81 is disposed such that the front side thereof is the S pole, while the back side thereof is the N pole. Therefore, the second magnet member is such that the magnetic substance 85 side thereof is the S pole, while the magnetic substance 86 side thereof is the N pole.
- magnetic substance 85 and magnetic substance 86 each have the same quadrangular-prism shape, and are respectively fixed to the front and back end surfaces of permanent magnet 83 .
- the total length of the second magnet member is approximately equal to center yoke 41 .
- permanent magnet 83 is preferably disposed at the center of the second magnet member, which allows the commonality of magnetic substances 85 and 86 .
- the second magnet member may be configured only with a permanent magnet.
- First magnet member 71 and second magnet member 81 are disposed parallel to each other with a predetermined distance in the left-right direction, and are fixed to driving member 91 made of resin or that like that has a rectangular frame shape in top view (see FIG. 5 and others). That is, first magnet member 71 and second magnet member 81 are disposed parallel to each other, along the front-back direction. In the front side, the N pole side of first magnet member 71 and the S pole side of second magnet member 81 are opposed to each other with the aforementioned predetermined distance in the left-right direction. In the back side, the S pole side of first magnet member 71 and the N pole side of second magnet member 81 are opposed to each other with the aforementioned predetermined distance in the left-right direction. Note, however, that the method of holding and fixing both first magnet member 71 and second magnet member 81 to driving member 91 is not particularly limited.
- FIG. 2 shows the state after integration.
- center yoke 41 is positioned between first magnet member 71 and second magnet member 81 .
- first magnet member 71 , second magnet member 81 , and center yoke 41 are positioned parallel to each other along the front-back direction.
- first magnet member 71 is positioned between center yoke 41 and first auxiliary yoke 51
- second magnet member 81 is positioned between center yoke 41 and second auxiliary yoke 61 .
- driving member 91 of the movable-side part holds one end of plate spring 93 , at the rear-side center of the frame-like part of the driving member. Then, the other end of plate spring 93 protrudes backward, and the tip of the other end is held by operation member 95 that is used to move driving member 91 in the left-right direction. Operation member 95 has an operation part which protrudes backward to the outside of case 31 . In this way, the major part of the movable-side part is configured.
- first magnet member 71 and second magnet member 81 respectively include permanent magnets 73 and 83 , either first magnet member 71 or second magnet member 81 is sticking to center yoke 41 in the usual state (the first state), which allows the movable-side part to be in a stable rest state.
- the state shown in FIGS. 1 to 7 where first magnet member 71 sticks to center yoke 41 is referred to as the first state.
- driving member 91 is positioned at the right side of the inside of case 31 .
- the operation part of operation member 95 is also positioned at the right side via plate spring 93 in the absence of load.
- first magnet member 71 is in the state where the left-side surface near the front end of magnetic substance 75 and the left-side surface near the back end of magnetic substance 76 are respectively away from the ends 53 and 54 of first auxiliary yoke 51 , and where the right-side surface near the front end of magnetic substance 75 and the right-side surface near the back end of magnetic substance 76 are respectively in contact with and sticking to the left-side surfaces of front end 42 and back end 43 of center yoke 41 .
- the portion at which first magnet member 71 is sticking to center yoke 41 is referred to as the first sticking portion.
- Second magnet member 81 is in the state where the left-side surface near the front end of magnetic substance 85 and the left-side surface near the back end of magnetic substance 86 are respectively away from the right-side surfaces of front end 42 and back end 43 of center yoke 41 , and where the right-side surface near the front end of magnetic substance 85 and the right-side surface near the back end of magnetic substance 86 are respectively sticking to the ends 63 and 64 of second auxiliary yoke 61 .
- the portion at which second magnet member 81 is sticking to second auxiliary yoke 61 is referred to as the second sticking portion.
- each of the magnetic substances employs a kind of material that is chosen such that the magnetic flux flowing through center yoke 41 is not greatly hampered by the flux coming from second magnet member 81 .
- the flux coming from second magnet member 81 flows to return to second magnet member 81 via second auxiliary yoke 61 .
- operation member 95 moves in the direction, which in turn causes plate spring 93 to bend correspondingly toward the left side.
- both first magnet member 71 and second magnet member 81 slidingly move horizontally toward the left side, in synchronization with each other.
- the state, as shown in FIGS. 8 and 9 after both first magnet member 71 and second magnet member 81 have slidingly moved horizontally to the left side, in synchronization, is referred to as the second state, hereinafter.
- the following two attractive forces come to contribute to the instantaneous movement of driving member 91 . That is, the attractive force between the left-side surfaces near the front and back ends of first magnet member 71 and respective ends 53 and 54 of first auxiliary yoke 51 , respectively, and the attractive force between the left-side surfaces near the front and back ends of second magnet member 81 and front end 42 and back end 43 of center yoke 41 , respectively.
- first magnet member 71 stops when the left-side surfaces near the front and back ends thereof become in contact with ends 53 and 54 of first auxiliary yoke 51 , respectively.
- second magnet member 81 stops when the left-side surfaces near the end and back ends thereof become in contact with the right-side surfaces of front end 42 and back end 43 of center yoke 41 , respectively.
- the movement of driving member 91 toward the left side comes to a halt (the second state).
- plate spring 93 has returned to the original state in the absence of load, and operation member 95 is positioned at the left side via plate spring 93 .
- the second state is shown in FIGS. 8 and 9 .
- first magnet member 71 In the second state, as shown in FIGS. 8 and 9 , the left-side surfaces near the front and rear ends of first magnet member 71 are in a state of respectively sticking to ends 53 and 54 of first auxiliary yoke 51 (a third sticking portion).
- the left-side surfaces near the front and rear ends of second magnet member 81 are in a state of respectively sticking to the right-side surfaces of front end 42 and back end 43 of center yoke 41 (a fourth sticking portion).
- the sticking portion at which first magnet member 71 sticks to first auxiliary yoke 51 is referred to as the third sticking portion
- second magnet member 81 sticks to center yoke 41 is referred to as the fourth sticking portion.
- the direction in which the magnetic flux flows through center yoke 41 changes instantaneously to be opposite to that in the first state shown in FIGS. 6 and 7 . That is, in the second state, the magnetic flux flows in center yoke 41 from rear end 43 toward front end 42 .
- the magnetic flux of permanent magnet 83 of second magnet member 81 flows through magnetic substance 86 , back end 43 of center yoke 41 , center yoke 41 , front end 42 of center yoke 41 , to magnetic substance 85 of second magnet member 81 , in this order.
- each of the magnetic substances employs the kind of material that is chosen such that, also in the second state, the aforementioned magnetic flux flowing through center yoke 41 is not greatly hampered by the flux coming from first magnet member 71 .
- it is configured that, in the second state, the flux coming from first magnet member 71 flows to return to first magnet member 71 via first auxiliary yoke 51 , which is in the same manner as that in the first state.
- induction coil 45 is preferably disposed in the center yoke such that the connection portions between the coil wire and the terminals are not subjected to unnecessary loads.
- a guiding means is disposed to slidingly move driving member 91 in the left-right direction.
- the configuration of the guiding means is not particularly limited, a simple structure may be preferably employed.
- guide pin 100 protruding in the up-down direction is disposed at each of the upper and lower surfaces of the corner portions of the frame-like part of driving member 91 .
- the guide pins are guided by linear grooves (not shown) disposed in the ceiling surface of cover 97 and by linear grooves 101 disposed in the inner bottom surface of case 31 , with these linear grooves extending in the left-right direction.
- linear grooves 101 may be through holes for larger insertion lengths of guide pins 100 .
- the guiding means of this configuration is also expected to prevent unfavorable guiding operations in a grating/creaking state.
- circular cylinder 103 protruding in the front-back direction is disposed at each of the left and right ends of the front and back surfaces of driving member 91 .
- Circular cylinders 103 are supported by steps disposed on the front and back walls of case 31 , thereby providing a smooth sliding of driving member 91 held in the horizontal state.
- this configuration may be optionally employed as deemed appropriate.
- spherical projections are disposed at the upper and lower surfaces of driving member 91 , or alternatively at the inner bottom surface of case 31 and the lower surface of cover 97 .
- the spherical projections cause driving member 91 to be approximately in contact with the corresponding surfaces in the upper-lower direction, allowing the slidably-contacting movement of the driving member. Even in this configuration, it is possible to render the driving member capable of smoothly sliding, being held in the horizontal state.
- the movable-side part is slidably moved in the left-right direction to generate the predetermined electromotive force, which allows the power generation device having a low-profile in the upper-lower dimension.
- the movable-side part may be capable of automatically returning from the having-moved state to the usual state, through the use of a sprig member or an elastic member disposed in the configuration.
- the above descriptions have been made using the configuration in which center yoke 41 is in the fixed state, while first magnet member 71 and second magnet member 81 slidingly move horizontally in synchronization.
- the fixed-side part and the movable-side part may be configured to play reverse roles. That is, the configuration may be such that: First magnet member 71 and second magnet member 81 are disposed and fixed, while center yoke 41 with induction coil 45 is disposed sliding-movably in the horizontal direction between the magnet members.
- both first auxiliary yoke 51 and second auxiliary yoke 61 in the fixed-side part may also be provided with induction coils, thereby generating electromotive forces.
- the fixed-side part may be configured without first auxiliary yoke 51 and second auxiliary yoke 61 .
- first magnet member 71 and second magnet member 81 has been described to be the rod-like one, their shape is not limited to it.
- the shape of first magnet member 71 and second magnet member 81 may be one that has a front end and a back end in the same manner as those of center yoke 41 , for example.
- the shape of center yoke 41 has been described to be one that has front end 42 and back end 43 , the shape is not limited to it.
- the shape of center yoke 41 may be a rod-like one which does not include front end 42 and back end 43 , for example.
- the descriptions have been made using the case where the profile of the device is so low in vertical dimension that the operation part to operate in the left-right direction is disposed to protrude backward.
- the operation part may be integrated with the upper or lower surface of driving member 91 to protrude in the up-down direction.
- the configuration concept according to the present invention is applicable to the case where the aforementioned configuration is implemented in vertical-orientation installation of the device, which provides a narrower width in size of the device.
- the power generation device has advantages that it can be configured in a low profile. This is beneficial for applications including a wide range of electronic equipment, and operation devices and units for remote control the equipment.
Abstract
Description
- This is a continuation of International Application No. PCT/JP2012/007180, with an international filing date of Nov. 8, 2012, which claims priority of Japanese Patent Application No. 2011-269702, filed on Dec. 9, 2011, the contents of each of which are hereby incorporated by reference.
- 1. Technical Field
- The present disclosure relates to compact power generation devices for use in a wide range of electronic equipment, and operation devices and units for remote control of the equipment.
- 2. Description of the Related Art
- In recent years, some of a wide range of electronic equipment, and operation devices and units for remote control of the equipment have increasingly been provided with built-in batteries for their operation. To address this trend, equipment manufacturers come to have increasing demands for development of compact-sized power generation devices.
- Hereinafter, a conventional power generation device will be described with reference to
FIG. 10 . -
FIG. 10 is a schematic view of the conventional power generation device. As shown inFIG. 10 , conventionalpower generation device 1 is provided withmagnet member 10 servicing as a movable-side part andyoke member 20 servicing as a fixed-side part. -
Magnet member 10 is configured includingpermanent magnet 11 such that the N pole and the S pole thereof are positioned in the upside and the downside, respectively. To the upper and lower surfaces ofpermanent magnet 11,upper plate 12 andlower plate 13 are respectively fixed, with the both being made of a magnetic substance. Then,magnet member 10 is rotatable in a clockwise/counterclockwise direction about rotation-axis line 11A that passes through the center ofpermanent magnet 11. -
Yoke member 20 is one that is made of a magnetic substance and formed in a U-shape when viewed from the top, and that is disposed and fixed to such as a case (not shown). The yoke member has leftleg 21 interposed between the left part ofupper plate 12 and the left part oflower plate 13, andright leg 22 interposed between the right part ofupper plate 12 and the right part oflower plate 13. Moreover,center part 23 connectsleft leg 21 andright leg 22. On the center part,induction coil 25 is wound. -
Coil spring 27 is disposed on the lower surface of the left part oflower plate 13. In this way,power generation device 1 is configured withmagnet member 10,yoke member 20 on whichinduction coil 25 is wound, and coilspring 27. -
Power generation device 1 is capable of generating electric power by an electromotive force which is induced ininduction coil 25 due to changes in a magnetic flux. The operation will be described hereinafter. - In
power generation device 1 shown inFIG. 10 ,magnet member 10 is applied with a force by such as a pressing member (not shown) from the upper left side ofupper plate 12, as indicated by the arrow inFIG. 10 . Then,magnet member 10 remains at rest, with the left part thereof being lowered. That is, in this situation, the lower surface of the left part ofupper plate 12 is in contact withleft leg 21 ofyoke member 20, while the upper surface of the right part oflower plate 13 is in contact withright leg 22. Moreover,coil spring 27 is pressed into a compressed state under the lower surface of the left part oflower plate 13. In a first state, the magnetic flux ofpermanent magnet 11 flows from the upside N pole through the left part ofupper plate 12, throughleft leg 21,center part 23, andright leg 22 ofyoke member 20, through the right part oflower plate 13, to the downside S pole ofpermanent magnet 11, in this order. Hereinafter, the state shown inFIG. 10 is referred to as the first state. - In the first state, when the applied force indicated by the arrow in
FIG. 10 is removed,coil spring 27 is released from the compressed state, which allowsmagnet member 10 to rotate clockwise about rotation-axis line 11A. Then, the magnet member comes to rest in the state where the upper surface of the left part oflower plate 13 is in contact withleft leg 21 ofyoke member 20, while the lower surface of the right part ofupper plate 12 is in contact with theright leg 22. Hereinafter, the state wherecoil spring 27 is released from the compressed state is referred to as the second state. - In the second state, the magnetic flux of
permanent magnet 11 flows from the upside N pole through the right part ofupper plate 12, throughright leg 22,center part 23, andleft leg 21 ofyoke member 20, through the left part oflower plate 13, to the downside S pole ofpermanent magnet 11, in this order. - That is, upon turning to the second state, the magnetic flux inside
yoke member 20 begins to flow in the opposite direction to that in the first state, which causes a change in the direction of the magnetic flux. Correspondingly to the change, a predetermined electromotive force is generated ininduction coil 25. Through the use of the electromotive force, a predetermined electric power is obtained via coil wires at the both ends acrossinduction coil 25. - Conversely, when the state is returned from the second state to the first state by rotating
magnet member 10 counterclockwise by such as pressing it with a pressing member, the magnetic flux inyoke member 20 begins to flow in the opposite direction to that in the second state. This also generates a predetermined electromotive force correspondingly ininduction coil 25, allowing the predetermined electric power via the coil wires. - It is noted that
Patent Literature 1, for example, is known as the information on the conventional technology related to the invention disclosed in the present application. - Patent Literature 1: U.S. Pat. No. 7,710,227
- Conventional power generation devices are configured to generate electric power in such a manner that
magnet member 10 servicing as a movable-side part rotates to induce an electromotive force ininduction coil 25 which can generate the power. This configuration, however, has had a problem that these devices are difficult to thin in size. - An object of the present disclosure is to overcome such the problem and to provide power generation devices with a configuration capable of being made thinner in size.
- To this end, the configuration according to the present disclosure is as follows.
- According to one aspect of the present disclosure includes a first magnet member, a second magnet member with the N pole positioned in the opposite direction to that of the first magnet member, a yoke disposed between the first magnet member and the second magnet member, and an induction coil disposed at the periphery of the yoke. When the first magnet member and the second magnet member slidingly move in synchronization with each other, or alternatively the yoke slidingly moves, the direction in which the magnetic flux flows in the yoke changes to induce an electromotive force in the induction coil. This configuration allows, because of the sliding movement of the magnet members or the yoke, the power generation device to be made thinner in size.
- According to the present disclosure, it is possible to provide the power generation device thinner in size.
-
FIG. 1 is an external perspective view of a power generation device according to a embodiment; -
FIG. 2 is a perspective view of the power generation device, with a cover being removed, according to the embodiment; -
FIG. 3 is an exploded perspective view of the power generation device according to the embodiment; -
FIG. 4 is a perspective view of a major part of a fixed-side part of the power generation device according to the embodiment; -
FIG. 5 is a perspective view of a major part of a movable-side part of the power generation device according to the embodiment; -
FIG. 6 is a top view illustrating a first state of the power generation device, with the cover being removed, according to the embodiment; -
FIG. 7 is a schematic view illustrating a positional relation in the first state between magnet members and a yoke of the power generation device, according to the embodiment; -
FIG. 8 is a top view illustrating a second state of the power generation device, with the cover being removed, according to the embodiment; -
FIG. 9 is a schematic view illustrating a positional relation in the second state between the magnet members and the yoke of the power generation device, according to the embodiment; and -
FIG. 10 is a schematic view of a conventional power generation device. - Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
- A embodiment will be described with reference to
FIGS. 1 to 9 .FIG. 1 is an external perspective view of a power generation device.FIG. 2 is a perspective view of the power generation device, with a cover being removed.FIG. 3 is an exploded perspective view of the device.FIG. 4 is a perspective view of a fixed-side part of the device.FIG. 5 is a perspective view of a movable-side part of the device.FIG. 6 is a top view illustrating a first state of the device, with the cover being removed.FIG. 7 is a schematic view illustrating a positional relation between magnet members and a yoke in the first state.FIG. 8 is a top view illustrating a second state of the power generation device, with the cover being removed.FIG. 9 is a schematic view illustrating a positional relation between the magnet members and the yoke in the second state. - As shown in
FIG. 4 ,case 31 made of resin has a box shape with an upside rectangular opening. In the inside of a recess ofcase 31, rod-like center yoke 41 made of a magnetic substance is fixed with an adhesive or the like. Note that, in the following descriptions, the direction along the longitudinal direction ofcenter yoke 41 is defined as the front-back direction, while the direction perpendicular to the longitudinal direction in plan view is defined as the left-right direction. -
Center yoke 41 is disposed and fixed at the center in the left-right direction of the recess ofcase 31 such that the longitudinal direction of the yoke is parallel to the front-back direction (seeFIG. 4 and others).Front end 42 andback end 43 of the longitudinal sides of the center yoke are each formed in the same quadrangular-prism shape that is larger in size than the midsection of the yoke. The left- and right-side surfaces offront end 42 andback end 43 are each a vertical flat surface. - At the periphery of the midsection between
front end 42 andback end 43 ofcenter yoke 41,induction coil 45 is disposed.Induction coil 45 is fixed to centeryoke 41.Induction coil 45 used herein is small in dimension enough to be accommodated within a space defined by the up-down and left-right dimensions of bothfront end 42 andback end 43. Coil wires coming from the both ends of the induction coil are fixed at connection parts that are disposed on the inner bottom surface ofcase 31, and are connected to terminals ofcase 31. - In the left end of the inside of
case 31, firstauxiliary yoke 51 is fixed with an adhesive or the like (seeFIG. 4 and others). The first auxiliary yoke has a U-shape in top view, with the top opening side of the U-shape facingcenter yoke 41. The lateral sides facing each other of the U-shape are each formed in the same quadrangular-prism shape; the lateral sides are parallel to each other and extend toward the right side.End 53 and end 54 of the U-shaped auxiliary yoke are opposed to the left-side surfaces offront end 42 andback end 43, respectively, at a predetermined distance.End 53 and end 54 of firstauxiliary yoke 51 as well are each formed to be a vertical flat surface. - Like this, in the right end of the inside of
case 31, secondauxiliary yoke 61 is fixed with such as an adhesive (seeFIG. 4 and others). The second auxiliary yoke has a U-shape in top view, with the top opening side of the U-shape facingcenter yoke 41. The lateral sides facing each other of the U-shape are each formed in the same quadrangular-prism shape; the lateral sides are parallel to each other and extend toward the left side.End 63 and end 64 of the U-shape are opposed to the right-side surfaces offront end 42 andback end 43, respectively, at the same distance as that for firstauxiliary yoke 51.End 63 and end 64 of firstauxiliary yoke 61 as well are each formed to be a vertical flat surface. - As described above, the major part of the fixed-side part is configured in this way. Next, the movable-side part that is movably combined with the fixed-side part will be described with reference to
FIG. 5 . - As shown in
FIG. 5 , the major part of the movable-side part is configured includingfirst magnet member 71,second magnet member 81, and drivingmember 91 to hold both the magnet members. The first and second magnet members are each formed in a rod shape. The driving member is a rectangular frame made of resin. -
First magnet member 71 is configured includingpermanent magnet 73 that is disposed at the center in the front-back direction of the first magnet member and that has a rectangular parallelepiped shape. To the front and back end surfaces of thepermanent magnet 73,magnetic substances permanent magnet 73 is disposed such that the front side thereof is the N pole while the back side thereof is the S pole; therefore, themagnetic substance 75 side of the first magnet member is the N pole, while themagnetic substance 76 side of the first magnet member is the S pole. The total length of the first magnet member is approximately equal tocenter yoke 41. It is noted thatpermanent magnet 73 is preferably disposed at the center of the first magnet member because this arrangement allows the commonality ofmagnetic substances permanent magnet 73 is not particularly limited. Note, however, that the first magnet member may be configured only with a permanent magnet, withoutmagnetic substances -
Second magnet member 81 includespermanent magnet 83 having a rectangular parallelepiped shape that is disposed at the center of the second magnet member in the front-back direction. Althoughsecond magnet member 81 has the same configuration as that offirst magnet member 71, its configuration is different from that offirst magnet member 71 in thatpermanent magnet 83 is arranged to have the opposite orientation to that ofpermanent magnet 73. That is,permanent magnet 83 ofsecond magnet member 81 is disposed such that the front side thereof is the S pole, while the back side thereof is the N pole. Therefore, the second magnet member is such that themagnetic substance 85 side thereof is the S pole, while themagnetic substance 86 side thereof is the N pole. Here,magnetic substance 85 andmagnetic substance 86 each have the same quadrangular-prism shape, and are respectively fixed to the front and back end surfaces ofpermanent magnet 83. The total length of the second magnet member is approximately equal tocenter yoke 41. Note that, as well asfirst magnet member 71, although the configuration ofsecond magnet member 81 is not particularly limited,permanent magnet 83 is preferably disposed at the center of the second magnet member, which allows the commonality ofmagnetic substances -
First magnet member 71 andsecond magnet member 81 are disposed parallel to each other with a predetermined distance in the left-right direction, and are fixed to drivingmember 91 made of resin or that like that has a rectangular frame shape in top view (seeFIG. 5 and others). That is,first magnet member 71 andsecond magnet member 81 are disposed parallel to each other, along the front-back direction. In the front side, the N pole side offirst magnet member 71 and the S pole side ofsecond magnet member 81 are opposed to each other with the aforementioned predetermined distance in the left-right direction. In the back side, the S pole side offirst magnet member 71 and the N pole side ofsecond magnet member 81 are opposed to each other with the aforementioned predetermined distance in the left-right direction. Note, however, that the method of holding and fixing bothfirst magnet member 71 andsecond magnet member 81 to drivingmember 91 is not particularly limited. - Driving
member 91 that holds bothfirst magnet member 71 andsecond magnet member 81 is integrated intocase 31, sliding-movably in the left-right direction.FIG. 2 shows the state after integration. In the state after integration, as shown inFIGS. 6 , 7, and others,center yoke 41 is positioned betweenfirst magnet member 71 andsecond magnet member 81. Then,first magnet member 71,second magnet member 81, andcenter yoke 41 are positioned parallel to each other along the front-back direction. Moreover,first magnet member 71 is positioned betweencenter yoke 41 and firstauxiliary yoke 51, whilesecond magnet member 81 is positioned betweencenter yoke 41 and secondauxiliary yoke 61. - As shown in
FIG. 6 and others, drivingmember 91 of the movable-side part holds one end ofplate spring 93, at the rear-side center of the frame-like part of the driving member. Then, the other end ofplate spring 93 protrudes backward, and the tip of the other end is held byoperation member 95 that is used to move drivingmember 91 in the left-right direction.Operation member 95 has an operation part which protrudes backward to the outside ofcase 31. In this way, the major part of the movable-side part is configured. - Then, cover 97 made of resin is placed, from the top, to cover
case 31 and drivingmember 91, and is bonded to case 31 (seeFIGS. 1 and 3 ). In this configuration, becausefirst magnet member 71 andsecond magnet member 81 respectively includepermanent magnets first magnet member 71 orsecond magnet member 81 is sticking to centeryoke 41 in the usual state (the first state), which allows the movable-side part to be in a stable rest state. In the following description, the state shown inFIGS. 1 to 7 wherefirst magnet member 71 sticks to centeryoke 41 is referred to as the first state. - In the first state, as shown in
FIG. 6 , drivingmember 91 is positioned at the right side of the inside ofcase 31. The operation part ofoperation member 95 is also positioned at the right side viaplate spring 93 in the absence of load. - In the first state, as shown in
FIGS. 6 and 7 ,first magnet member 71 is in the state where the left-side surface near the front end ofmagnetic substance 75 and the left-side surface near the back end ofmagnetic substance 76 are respectively away from theends auxiliary yoke 51, and where the right-side surface near the front end ofmagnetic substance 75 and the right-side surface near the back end ofmagnetic substance 76 are respectively in contact with and sticking to the left-side surfaces offront end 42 andback end 43 ofcenter yoke 41. The portion at whichfirst magnet member 71 is sticking to centeryoke 41 is referred to as the first sticking portion. -
Second magnet member 81 is in the state where the left-side surface near the front end ofmagnetic substance 85 and the left-side surface near the back end ofmagnetic substance 86 are respectively away from the right-side surfaces offront end 42 andback end 43 ofcenter yoke 41, and where the right-side surface near the front end ofmagnetic substance 85 and the right-side surface near the back end ofmagnetic substance 86 are respectively sticking to theends auxiliary yoke 61. The portion at whichsecond magnet member 81 is sticking to secondauxiliary yoke 61 is referred to as the second sticking portion. - In the first state shown in
FIG. 7 , the magnetic flux flows throughcenter yoke 41, fromfront end 42 towardback end 43. That is, the magnetic flux flows in the following order: frompermanent magnet 73 offirst magnet member 71, throughmagnetic substance 75,front end 42 ofcenter yoke 41,center yoke 41, andback end 43 ofcenter yoke 41, tomagnetic substance 76 offirst magnet member 71. In the configuration according to the embodiment, each of the magnetic substances employs a kind of material that is chosen such that the magnetic flux flowing throughcenter yoke 41 is not greatly hampered by the flux coming fromsecond magnet member 81. In addition, it is configured that, in the first state, the flux coming fromsecond magnet member 81 flows to return tosecond magnet member 81 via secondauxiliary yoke 61. - In the first state, when the operation part of
operation member 95 is operated to move horizontally toward the left direction,operation member 95 moves in the direction, which in turn causesplate spring 93 to bend correspondingly toward the left side. - Then, when the spring force of thus-
bended plate spring 93 becomes stronger than the sum of the sticking forces at the first and second sticking portions, the first and second sticking portions are released from the sticking situation. Then, drivingmember 91 moves instantaneously toward the left side due to the spring force along the direction in which the operation member is moved, with the spring force acting onbended plate spring 93 and causing it to recover. That is, bothfirst magnet member 71 andsecond magnet member 81 slidingly move horizontally toward the left side, in synchronization with each other. The state, as shown inFIGS. 8 and 9 , after bothfirst magnet member 71 andsecond magnet member 81 have slidingly moved horizontally to the left side, in synchronization, is referred to as the second state, hereinafter. - Also, in addition to this, after the movable-side part has passed the midpoint on the way to the left side, the following two attractive forces come to contribute to the instantaneous movement of driving
member 91. That is, the attractive force between the left-side surfaces near the front and back ends offirst magnet member 71 and respective ends 53 and 54 of firstauxiliary yoke 51, respectively, and the attractive force between the left-side surfaces near the front and back ends ofsecond magnet member 81 andfront end 42 andback end 43 ofcenter yoke 41, respectively. - After that,
first magnet member 71 stops when the left-side surfaces near the front and back ends thereof become in contact with ends 53 and 54 of firstauxiliary yoke 51, respectively. At the same time,second magnet member 81 stops when the left-side surfaces near the end and back ends thereof become in contact with the right-side surfaces offront end 42 andback end 43 ofcenter yoke 41, respectively. Thus, the movement of drivingmember 91 toward the left side comes to a halt (the second state). In the second state,plate spring 93 has returned to the original state in the absence of load, andoperation member 95 is positioned at the left side viaplate spring 93. The second state is shown inFIGS. 8 and 9 . - In the second state, as shown in
FIGS. 8 and 9 , the left-side surfaces near the front and rear ends offirst magnet member 71 are in a state of respectively sticking to ends 53 and 54 of first auxiliary yoke 51 (a third sticking portion). On the other hand, the left-side surfaces near the front and rear ends ofsecond magnet member 81 are in a state of respectively sticking to the right-side surfaces offront end 42 andback end 43 of center yoke 41 (a fourth sticking portion). As shown inFIG. 9 , the sticking portion at whichfirst magnet member 71 sticks to firstauxiliary yoke 51 is referred to as the third sticking portion, while the sticking portion at whichsecond magnet member 81 sticks to centeryoke 41 is referred to as the fourth sticking portion. - Such the sticking of these portions allows the movable-side part to be held in a stable rest state, which is in the same manner as that in the usual state (the first state).
- Upon turning to the second state shown in
FIGS. 8 and 9 , the direction in which the magnetic flux flows throughcenter yoke 41 changes instantaneously to be opposite to that in the first state shown inFIGS. 6 and 7 . That is, in the second state, the magnetic flux flows incenter yoke 41 fromrear end 43 towardfront end 42. The magnetic flux ofpermanent magnet 83 ofsecond magnet member 81 flows throughmagnetic substance 86,back end 43 ofcenter yoke 41,center yoke 41,front end 42 ofcenter yoke 41, tomagnetic substance 85 ofsecond magnet member 81, in this order. - Note, however, that each of the magnetic substances employs the kind of material that is chosen such that, also in the second state, the aforementioned magnetic flux flowing through
center yoke 41 is not greatly hampered by the flux coming fromfirst magnet member 71. In addition, it is configured that, in the second state, the flux coming fromfirst magnet member 71 flows to return tofirst magnet member 71 via firstauxiliary yoke 51, which is in the same manner as that in the first state. - As described above, in the embodiment, when the movable-side part is slidingly moved horizontally, from the first state to the second state, the direction of the flow of the magnetic flux through
center yoke 41 is turned to be the opposite one. This change in the magnetic flux generates an electromotive force ininduction coil 45 disposed incenter yoke 41. Then, from the electromotive force generated ininduction coil 45, electric power is obtained via the terminals (not shown) connected to the coil wire ofinduction coil 45. Becausecenter yoke 41 is included in the fixed-side part,induction coil 45 is preferably disposed in the center yoke such that the connection portions between the coil wire and the terminals are not subjected to unnecessary loads. - The operation of returning the movable-side part, to the first state from the second state where the part is in the left side, is accomplished in the same manner except only for left-right symmetry; therefore, the description thereof is omitted. Upon returning, the direction of the flow of the magnetic flux through
center yoke 41 is turned to be the opposite one instantaneously. In response to this, a corresponding electromotive force is generated ininduction coil 45, allowing electric power via the terminals (not shown). - Although not shown in the embodiment, a guiding means is disposed to slidingly
move driving member 91 in the left-right direction. Although the configuration of the guiding means is not particularly limited, a simple structure may be preferably employed. For example, in the configuration,guide pin 100 protruding in the up-down direction is disposed at each of the upper and lower surfaces of the corner portions of the frame-like part of drivingmember 91. The guide pins are guided by linear grooves (not shown) disposed in the ceiling surface ofcover 97 and bylinear grooves 101 disposed in the inner bottom surface ofcase 31, with these linear grooves extending in the left-right direction. Note, however, thatlinear grooves 101 may be through holes for larger insertion lengths of guide pins 100. The guiding means of this configuration is also expected to prevent unfavorable guiding operations in a grating/creaking state. - Moreover, in this configuration,
circular cylinder 103 protruding in the front-back direction is disposed at each of the left and right ends of the front and back surfaces of drivingmember 91.Circular cylinders 103 are supported by steps disposed on the front and back walls ofcase 31, thereby providing a smooth sliding of drivingmember 91 held in the horizontal state. However, this configuration may be optionally employed as deemed appropriate. Alternatively, another configuration is possible where spherical projections are disposed at the upper and lower surfaces of drivingmember 91, or alternatively at the inner bottom surface ofcase 31 and the lower surface ofcover 97. The spherical projections cause drivingmember 91 to be approximately in contact with the corresponding surfaces in the upper-lower direction, allowing the slidably-contacting movement of the driving member. Even in this configuration, it is possible to render the driving member capable of smoothly sliding, being held in the horizontal state. - As described above, in the configuration, the movable-side part is slidably moved in the left-right direction to generate the predetermined electromotive force, which allows the power generation device having a low-profile in the upper-lower dimension.
- Note that, although the descriptions of the configuration have been made using the case where driving
member 91 is moved by the spring force ofplate spring 93 which is applied along the direction of the movement of the movable-side part, another spring member or elastic member having a different shape may be employed to have the same functions and effects. Alternatively, in the case where the slidingly-moving stroke is rather short, there is not always the need forplate spring 93, the elastic member, or the like described above, and the configuration may be without them. - Moreover, the movable-side part may be capable of automatically returning from the having-moved state to the usual state, through the use of a sprig member or an elastic member disposed in the configuration.
- Note that, the above descriptions have been made using the configuration in which
center yoke 41 is in the fixed state, whilefirst magnet member 71 andsecond magnet member 81 slidingly move horizontally in synchronization. However, the fixed-side part and the movable-side part may be configured to play reverse roles. That is, the configuration may be such that:First magnet member 71 andsecond magnet member 81 are disposed and fixed, whilecenter yoke 41 withinduction coil 45 is disposed sliding-movably in the horizontal direction between the magnet members. - Moreover, both first
auxiliary yoke 51 and secondauxiliary yoke 61 in the fixed-side part may also be provided with induction coils, thereby generating electromotive forces. Furthermore, the fixed-side part may be configured without firstauxiliary yoke 51 and secondauxiliary yoke 61. - Note that, in the embodiment, although the shape of
first magnet member 71 andsecond magnet member 81 has been described to be the rod-like one, their shape is not limited to it. The shape offirst magnet member 71 andsecond magnet member 81 may be one that has a front end and a back end in the same manner as those ofcenter yoke 41, for example. Note that, in the embodiment, although the shape ofcenter yoke 41 has been described to be one that hasfront end 42 andback end 43, the shape is not limited to it. The shape ofcenter yoke 41 may be a rod-like one which does not includefront end 42 andback end 43, for example. - Moreover, up to this point, the descriptions have been made using the case where the profile of the device is so low in vertical dimension that the operation part to operate in the left-right direction is disposed to protrude backward. However, the operation part may be integrated with the upper or lower surface of driving
member 91 to protrude in the up-down direction. Furthermore, the configuration concept according to the present invention is applicable to the case where the aforementioned configuration is implemented in vertical-orientation installation of the device, which provides a narrower width in size of the device. - The power generation device according to the present disclosure has advantages that it can be configured in a low profile. This is beneficial for applications including a wide range of electronic equipment, and operation devices and units for remote control the equipment.
Claims (6)
Applications Claiming Priority (3)
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JP2011269702 | 2011-12-09 | ||
JP2011-269702 | 2011-12-09 | ||
PCT/JP2012/007180 WO2013084409A1 (en) | 2011-12-09 | 2012-11-08 | Power generation device |
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PCT/JP2012/007180 Continuation WO2013084409A1 (en) | 2011-12-09 | 2012-11-08 | Power generation device |
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US9647521B2 (en) * | 2014-10-20 | 2017-05-09 | Shen-Ko Tseng | Power generating device and an object for utilizing the power generating device |
US10608516B2 (en) | 2015-03-09 | 2020-03-31 | Panasonic Intellectual Property Management Co., Ltd. | Power generation device |
US20160314923A1 (en) * | 2015-04-24 | 2016-10-27 | Mitsumi Electric Co., Ltd. | Power generation switch |
US9754748B2 (en) * | 2015-04-24 | 2017-09-05 | Mitsumi Electric Co., Ltd. | Power generation switch |
US11056961B2 (en) | 2016-04-19 | 2021-07-06 | Panasonic Intellectual Property Management Co., Ltd. | Power generator, input device, and lock device with sensor |
FR3093874A1 (en) * | 2019-03-15 | 2020-09-18 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | electromagnetic device |
WO2020188159A1 (en) * | 2019-03-15 | 2020-09-24 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Electromagnetic device |
Also Published As
Publication number | Publication date |
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CN103988405A (en) | 2014-08-13 |
CN103988405B (en) | 2016-10-05 |
JP6155470B2 (en) | 2017-07-05 |
WO2013084409A1 (en) | 2013-06-13 |
US9240267B2 (en) | 2016-01-19 |
JPWO2013084409A1 (en) | 2015-04-27 |
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